package org.yaukie.config;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ConfigurableApplicationContext;

public class SpringContextUtil implements ApplicationContextAware {  
    private static ApplicationContext applicationContext;  
    
    private static final  String xmlPath = "/WEB-INF/resources/applicationContext.xml";
    
    /** 
     * 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量. 
     */  
    public void setApplicationContext(ApplicationContext applicationContext) {  
        SpringContextUtil.applicationContext = applicationContext; // NOSONAR  
    }  
  
    /** 
     * 取得存储在静态变量中的ApplicationContext. 
     */  
    public static ApplicationContext getApplicationContext() {  
        checkApplicationContext();  
        return applicationContext;  
    }  
  
    /** 
     * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型. 
     */  
    @SuppressWarnings("unchecked")  
    public static <T> T getBean(String name) {
        checkApplicationContext();  
        return (T) applicationContext.getBean(name);  
    }  
  
    /** 
     * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型. 
     */  
    @SuppressWarnings("unchecked")  
    public static <T> T getBean(Class<T> clazz) {  
        checkApplicationContext();  
        return (T) applicationContext.getBeansOfType(clazz);  
    }  
  
    /** 
     * 清除applicationContext静态变量. 
     */  
    public static void cleanApplicationContext() {  
        applicationContext = null;  
    }  
  
    private static void checkApplicationContext() {  
        if (applicationContext == null) {  
            throw new IllegalStateException("applicaitonContext未注入,请在applicationContext.xml中定义SpringContextHolder");  
        }  
    }  
    
    public static void addBean(Class cls ,String beanName)
    {
    		BeanDefinitionBuilder  beanDefinitionBuilder =BeanDefinitionBuilder.rootBeanDefinition(cls);
//    		beanDefinitionBuilder.addPropertyValue(beanName, cls.getName());
    		registerBeanEntity(beanName,beanDefinitionBuilder.getRawBeanDefinition());
    }
    
    private static void registerBeanEntity(String beanName , BeanDefinition beanDefinition)
    {
    	ConfigurableApplicationContext configurableApplicationContext = (ConfigurableApplicationContext)applicationContext;
    	DefaultListableBeanFactory autowireCapableBeanFactory =(DefaultListableBeanFactory) configurableApplicationContext.getAutowireCapableBeanFactory();
    	autowireCapableBeanFactory.registerBeanDefinition(beanName, beanDefinition);
    }
  
}  